Attachment to furnace-doors.



A. E. VEZINA.

ATTACHMENT TO PURNAGE-DOORS.

APPLIGATION FILED Nov.1a, ,1911.

1,068,715., Patented Ju1y29, 1913.

a furnace door which can be easiy and v horizontal sectional view through the end of sections, the sections being taken in the attachment as applied to the boiler of a rail- .such as are designed particularly to use in .1. Fig. 3 is a horizontal sectional view v beinYg taken in the plane denoted by the line .ALNTOIN ILE VEZINA, 0F

.naar mentirosa, canapa.

arri-enanas 'fre tramonta-ms specification of Leners man. patenten muy ce, iets,

Application illed November 13, wil. erla'l tto. 6,7917.

To all whom t may concern Be it' known that I, ANTOINE Emmi VEZINA, a subject of the King` of Great Britain, of the city of Bran n, in the Province of. Manitoba, Canada, have ivented certain new and useful improve ments in Attachments to Furnace-Doors, of which the following is the specification.

My invention relates to mechanism for mechanically opening and closing lthe hre doors of a furnace, and more specihcally to conjunction with the tire doors of a locomotive.

The object of the invention is to rovide quickly opened and closed without requiring the fireman to use his hands, andmyinvention consists of a furnace door which the fireman can open with his foot by stepping on a lever or other suitable appliance, and which will close itself when the reman removes his f'oo't from the lever.

v A further object of the invention is to proy vide a simply constructed, durable, and etticientdoor which will operate quickly and so prevent any prolonged inrush of air to the furnace during the time that it is 'being fired.

With the above objects in view the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described and later pninted out in the appended claims.

Figure 1 represents an end View of a boiler with my attachment applied, and in the closed position. Fig. 2 represents a the boiler and door, the section beirg taken in the plane denoted by the line X Fig.

through the end of the boiler and parts of the door operating mechanism, the section Y Fig. 1. Fig.V 4 is a vertical sectional View through a portion of one of thedoor plane denoted by the line Z Z', Fig. 1. Fig. 5 is a vertical sectional view through the platform and under plate of the boiler, the section 4being taken in the plane denoted by the line V V, Fig. l.

In the drawing like characters of refergure.

'In the present instance I have shown the ence indicate corresponding parts in each 4road engine, butl it l'is to "be understood of pieces 7 and 8 permanently 4fired to the en'd 2 ofY 'the boiler. rthe lower ends of the shafts extend beyond the bearing pieces 8 and receive o positely wound spiral springs 9 and 10, w ich springs have their lower ends fastened to the extremities of the shafts, yand their upper ends secured to the bearing pieces 8.

A represents the furnace door which is formed frein two similar'sections l11 and 12 secured to the shafts 5 and 6, respectively. Each section is formed from a number of similar plates 13 connected together by hinges 14 'and reinforced by longitudinally disposed ribs415. The outer plates of each section are 'pivotally secured to the shafts by pivot pins 16, while the inner plates aredesigned to overlap as shown at 17.

18 and 19 are upper and lower sets of horizcntally disposed guide bars firmly se cured to the e'nd 2 of the boiler and receiving the door sections slidably.

It is here to be noti-ced that the shafts 5 and 6 have the body portions 5 and 6 thereof square in cross section and of such dimension that the plates can be rolled on to them upon the shafts being turned. Each shaft is provided with grooves 20 and 21 which receive the hinges connecting the plates. The reason for this will be readily understood.

22 is a guide rod connected at its upper and lower ends permanently to the end of the boiler. The rod receivesl slidably a weight 23 connected to lazy tongs 24 pivotally secured to the weight at 25 and to the floor at 26.

-27 is a crank shaft rotatably mounted in suitable bearings -28 fixed to the car platform.

29 is a foot trip pedal extending from the shaft 27.

30 is a lever pivotally secured within a bracket 31 extending upwardly from the car floor, and 32 is a link connecting one end of the crank arm of the lever 30 with the crank of the shaft 27. By this construction the end of lever 30 is elevated above the v adjacent end of theicrank shaft 27 and a ro- 34 and 35 are chains connecting the weight with theinner plates of the reflective doors. The chains operate over rollers 36 and 37 inserted within the inner ends of the guide bars 19.

In the actual construction of the device the weight 23 has to be heavy enough to overcome the turning effect of the springs on the shafts, otherwise the door sections would be held normallyopen and this of course is not permitted.

The operation of the device is now described. Upon the reman placing his foot on the trip 29 and ressing it downwardly, the crank shaft puls on t e lever through the agency of the link 32 and causes the lazy tongs to extend. The weight is accordingly raised on the ide rod and the springs operate to turn t e shafts 5 and 6 and consequently roll up the door sections. This exposes the doorway opening for firing urposes. Upon the foot being removed rom the trip the weight falls and draws the door sections closed. For convenience in operating I have fitted the shafts with ball bearings 38 which allow them to turn very easily.

What I claim as my invention is:

1. The combination with a boiler having an end thereof provided with the usual doorway opening, of a set of vertically disposed shafts carried b the end of the boiler and located a-t the si es of the doorway opening, said shaft being square throughout substantially its entire length and provided with grooves, hinged door sections secured to the grooved portions of said shafts and adapted to wind thereon, guide bars receiving the lsections in their closed position, a guided Weight connected to the door sections and holding them normally closed, means for raising the weight, and means for winding the sections yon the shafts upon the weight bfceiig raised, as and for the purpose spec- 1 e 2. The combination with a boiler having an end thereof provided with the usual doorway opening, of a setl of vertically disposed rotatable shafts located at the sides of the doorway opening, flexible door Asections hingedly secured to the shafts and adapted to be wound thereon, said sections normally closing the doorway opening, guide bars re- -are held normally ceiving the sections and supporting the same slidably, a weight suspended from the door sections and \holding the same normally dlosed, a lazy t ngs connected to said weight at one end and to the boiler platform at the other end, a lever connected to said lazy tongs, and a foot actuated lever fo-r rotating said first named lever for raising. the weight, and spring means for winding the sections on the shafts upon the raising of the Weight. 3. The combination with a boiler having an end thereof provided with the usual doorway opening, of a set of verticall shafts carried by the end of the boiler and located at the sides of the doorway opening, hinged door sections secured to the shafts and adapted to wind thereon, guide bars redisposed l ceivin the sections in their closed position,

a gui ed weight connected to the door sections and holding them normally closed, means for raising the weight, and means for winding the sections on the shafts upon the' weight being raised, as and for the purpose specified.

4. The combination with a boiler having an end thereof provided with the usual doorwa-y o ening, of a set of verticallydisposed rotata le shafts located at the sides of the doorway opening, flexible door sections hingedly secured to the shafts and adapted to be wound thereon, said sections normally closing the doorway opening, guide bars receiving the sections and supporting the same slidably, a weight suspended from the door sections and holding the same normally closed, means lactuated by a foot trip for raising the weight, and spring means for winding the sections on the shafts upon the weight being raised, as and for the purpose specied. l

5. The combination with a boiler having an end thereof provided with the usual doorway opening, of a set of vertically disposed and rotatably mounted shafts located at the `sides of the doorway opening, door sections formed from hinged plates pivotally connected to the shafts and adapted to wind I thereon, guide bars receiving the ed es of the sections slidably, a vertically slldable weight located beneath the doorway sections and connected thereto whereby the sections closed, a foot trip adapted to raise the weig t, and springs connected to the shafts and designed to rotate them and wind the door sections thereon upon the weight being raised, as and for the purpose specified.

6. The combination with a boiler having an end thereof provided with the usual doorway opening, of a set of vertically disposed and rotatably mounted shafts located at the sides of the doorway opening and having the body portion thereof square in cross section, similar door sections formed from hinged plates and having their outer edges mesma pivotally secured to the body portions of the shafts, upper and lower sets of guide bars located at the top and bottom of the doorway opening and receiving the door sections slidably, a vertically disposed guide rod beneath the doorway opening, a weight slidable on the guiderod, chains connecting the weight with the door sections, said weight being designed to hold the sections closed, a foot trip, means actuated .by the foot trip and connected to the Weight for raising the weight a considervable dist-ance for a small depression of the trip, and springs for rotating the shafts and winding the door sections thereon upon the weight being raised, as and for the purpose 15 speciied.`

Signed at Brandon in the Province of Manitoba this 27th day of' May 1911.

ANTOINE EMILE VEZINA.

In the presence of- FRANK PRIMEAU, Wm DE MANBEY. 

